These guys deliever a massive table of hashes with corresponding passwords, called ‘rainbow cracking.’ They’re planning on selling it; but I’m sure it’ll be availble on torrent in no time.
Also, this is done for free at http://www.loginrecovery.com with an option to pay to get quicker access.
I would like to use PCUnlocker Live CD to crack Windows password by myself, instead of uploading the password hash to loginrecovery.